NADAC weekly drug prices
What US pharmacies pay for every drug code, every week, with the manufacturer and its stock ticker, plus a weekly generic deflation index.
The National Average Drug Acquisition Cost (NADAC) is the price US retail pharmacies actually pay for each drug, surveyed by CMS and published every week as a file of about 30,000 National Drug Codes (NDCs). It is the closest public series to a wholesale generic drug price index in the United States.
This product is the weekly series as a panel: one row per NDC per week, with the prior week's price and week-over-week change, the price 52 weeks earlier and year-over-year change, a flag for whether the price was repriced that week, the FDA labeler of record, and a stock ticker where the labeler is a listed company. A second table is a weekly generic deflation index: median and mean week-over-week and year-over-year change across all generic NDCs, the share of NDCs falling, rising and unchanged, the number repriced, and a chained index level.
How the weekly file behaves, and why it matters for reading the data. Each weekly file is a full snapshot. week_date is the file date. effective_date is when the current price took effect and only moves when CMS reprices. CMS reprices the whole file roughly monthly (about 27,000 NDCs move on a reprice week, dozens otherwise), so the weekly median week-over-week change is zero in about three weeks out of four. Read yoy_change_pct, or share_falling and n_repriced on reprice weeks, or a four-week roll of wow_change_pct.
Generic price deflation by molecule and by labeler ahead of quarterly reports. Brand-to-generic spread at loss of exclusivity.
- CMS reprices the whole file about monthly, so median week-over-week change is zero in most weeks. Read year-over-year, or the repriced weeks.
- 61% of NDCs carry a ticker; the rest are private manufacturers and carry a company name only.
- Rows
- 5,540,987 NDC-weeks across 192 weeks, 2023-01-04 to 2026-09-02; about 30,000 NDCs per week. Index: 192 weekly rows.
- Product cadence
- Weekly, the Monday after CMS posts
- Lag
- One to two weeks
- Lookback shipped
- 88 weeks, 2025-01-01 to 2026-09-02
- Backfill available
- 2024 staged for the next load; earlier years from the same CMS archive on request
- Vintage
- derived at export from the latest week loaded.
- Tables
- 2
- Licence
- $750 per month per firm, or inside the suite
Where every row comes from.
| Source | Source cadence | History |
|---|---|---|
| CMS NADAC weekly files (data.medicaid.gov) | Weekly | Published since November 2013 |
| FDA National Drug Code Directory | Daily | Current products and excluded-products files |
| Healthparse labeler to ticker map | With each load | 83 companies, 60 listed |
Dictionary source line: CMS NADAC weekly files via the yearly datasets on data.medicaid.gov; FDA National Drug Code Directory (current products and the excluded-products file) for labeler names; a curated Healthparse labeler-to-ticker map (83 companies, 60 listed).
2 tables, three meta columns each.
Every table carries _dataset, _vintage and _exported_at in addition to the columns in the dictionary.
| Table | Snowflake path | Columns | Rows |
|---|---|---|---|
| nadac_weekly_prices | HEALTHPARSE_DATA.NADAC_DRUG_PRICES.NADAC_WEEKLY_PRICES | 20 | |
| nadac_generic_index_weekly | HEALTHPARSE_DATA.NADAC_DRUG_PRICES.NADAC_GENERIC_INDEX_WEEKLY | 7 |
NADAC Weekly Drug Prices
Three real rows pulled from the production tables on 2026-09-10. The query is recorded next to the rows in the site source.
| Drug (NDC description) | Ticker | NADAC per unit | YoY |
|---|---|---|---|
| ELURYNG VAGINAL RING | AMRX | $47.17 | -4.9% |
| ETONOGESTREL-EE VAGINAL RING | TEVA | $47.17 | -4.9% |
| FONDAPARINUX 10 MG/0.8 ML SYR | VTRS | $46.03 | +41.1% |
Evaluate NADAC weekly drug prices
Free California sample on the marketplaces. 30-day full-table evaluation on request.